/Engine/Plugins/Experimental/PCG/Source/PCG/Public/PCGGraph.h
typedef TMulticastDelegate_ThreeParams< void, [UPCGGraphInterface](API\Plugins\PCG\UPCGGraphInterface) *, [EPCGGraphParameterEvent](API\Plugins\PCG\EPCGGraphParameterEvent), [FName](API\Runtime\Core\UObject\FName) > FOnPCGGraphParametersChanged